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The PARKER PT-00448 is a flareless bite-type tube nut designed for use in hydraulic and fluid-conveyance tube assemblies. It threads onto an M22 x 1.5 fitting body and is sized for a 15 mm tube outside diameter. The bite-type design uses a ferrule or sleeve to grip the tube mechanically without requiring a flared tube end, making assembly faster and more reliable in tight installations. This nut is a standard compression-style component installed by hydraulic technicians, fluid power mechanics, and plumbing professionals working on metric tube systems.
This tube nut is suited for metric tube fittings in hydraulic power units, industrial fluid lines, and process plumbing where M22 x 1.5 threaded connections are specified. The 15 mm tube OD sizing is common in European-standard and metric hydraulic assemblies. It is typically paired with a matching bite-type fitting body and ferrule to form a complete flareless connection. Each package contains 4 nuts.
Designed as an OEM-style replacement or service component for metric flareless bite-type tube fitting assemblies requiring an M22 x 1.5 nut for 15 mm OD tubing.
Installation is performed by hydraulic or fluid power technicians. Depressurize and isolate the hydraulic or fluid system completely before disassembling any tube connections. Use the correct metric wrench size to avoid rounding the nut. Follow the fitting manufacturer torque and pre-swaging procedure for bite-type fittings to ensure proper ferrule bite and leak-free assembly.
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